Blind VXLAN injection into encrypted overlay networks from cluster peer
Summary
| CVE | CVE-2026-92542 |
|---|---|
| State | PUBLISHED |
| Assigner | Docker |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-07 17:17:02 UTC |
| Updated | 2026-10-08 20:46:35 UTC |
| Description | The firewall rules which mark VXLAN datagrams for encryption indiscriminately match both authentic VXLAN datagrams sent from the kernel and forged datagrams sent by user processes. Any packet sent from the host network namespace of a Linux Swarm node is encrypted with the overlay-network IPsec parameters which meets the following criteria: - UDP datagram - Destination port is the Swarm data-path port - Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to |
Risk And Classification
Primary CVSS: v4.0 6.9 MEDIUM from [email protected]
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.000660000 probability, percentile 0.000180000 (date 2026-10-10)
Problem Types: CWE-290 | CWE-290 CWE-290 Authentication Bypass by Spoofing
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.9 | MEDIUM | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 6.9 | MEDIUM | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
CVSS v4.0 Breakdown
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Docker | Docker Engine | affected 25.0.19 semver | Linux |
| CNA | Docker | Docker Engine | affected 26.0.0 29.8.2 semver | Linux |
| CNA | Docker | Docker Engine Overlay Network Driver | affected v25.0.19 semver | Linux |
| CNA | Docker | Docker Engine Overlay Network Driver | affected v26.0.0 * semver | Linux |
| CNA | Moby | Moby Overlay Network Driver | affected v2.0.0-beta.0 v2.0.0-beta.25 semver | Linux |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/moby/moby/security/advisories/GHSA-6m9p-4h64-m6vh | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Workarounds
CNA: Block userspace processes from sending UDP packets to the Swarm data-path port. iptables -I OUTPUT -p udp --dport "$(docker info --format '{{.Swarm.Cluster.DataPathPort}}')" -m owner --socket-exists -j DROP